97666601 has 2 divisors, whose sum is σ = 97666602. Its totient is φ = 97666600.

The previous prime is 97666571. The next prime is 97666703. The reversal of 97666601 is 10666679.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96510976 + 1155625 = 9824^2 + 1075^2 .

It is an emirp because it is prime and its reverse (10666679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97666601 - 2⁶ = 97666537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97666501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48833300 + 48833301.

It is an arithmetic number, because the mean of its divisors is an integer number (48833301).

Almost surely, 2^97666601 is an apocalyptic number.

It is an amenable number.

97666601 is a deficient number, since it is larger than the sum of its proper divisors (1).

97666601 is an equidigital number, since it uses as much as digits as its factorization.

97666601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 97666601 is about 9882.6413979260. The cubic root of 97666601 is about 460.5202070102.

The spelling of 97666601 in words is "ninety-seven million, six hundred sixty-six thousand, six hundred one".